package wang.zl.bookmanager1.config;

import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import wang.zl.bookmanager1.R.JacksonObjectMapper;

import java.util.List;

/**
 * @author like
 * @date 2022/9/20 6:40
 * @Description TODO
 */
@Slf4j
@Configuration
@EnableWebMvc
public class WebMvcConfig extends WebMvcConfigurationSupport {

    @Override
    /**
     * @param registry
     * 设置静态资源映射
     * @author WZL
     * @date 2022/9/20 6:41
     * @Description TO
     */
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        log.info("开始进行静态资源映射。。。");
        registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/");
        registry.addResourceHandler("/front/**").addResourceLocations("classpath:/front/");

    }

    /**
     * 扩展mvc框架的消息转换器
     * @param converters
     */
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        //创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
        //设置对象转换器，底层使用JAckson将Java对象转为json
        messageConverter.setObjectMapper((new JacksonObjectMapper()));
        //将上面的消息转换器追加到mvc框架的转换器中
        converters.add(0,messageConverter);
    }


}
